Pumping-jack.



J. M. STIEGER.

PUMPING JACK. APPLIGATION FILED SEPT. 7. 1912.

1,128,260. Patented Feb.9, 1915.

WITNESSES: IN I/E IV TOR JAKOB MARTIN STIEGER, OF HUMBLE, TEXAS.

PUMPING-JACK.

Specification of Letters Patent.

Patented Feb. 9, 1915.

Application filed September '7, 1912. Serial No. 719,074.

To all whom it may concern Be it known that I, JAKoB MARTIN Srinonn, a citizen of the United States, residing at Humble, in the county of Harms and State of Texas, have invented certain new and useful Improvements in Pumping- Jacks, of which the following is a specification.

My invention relates to new and useful improvements in pumping jacks.

The object of this invention is to provide a device of the character described provided with an improved clamp for engaging with the pump rod which is operated by said jack, said clamp being provided with detachable parts which are subjected to the greatest wear and which may be removed when worn and replaced with new parts.

WVith the above and other objects in view, the invention has particular relation to certain novel features of construction and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings, wherein- Figure l is a side elevation of the complete jack, the improved part being shown in full lines and the parts which are common to all pump jacks of this character being shown in dotted lines. Fig. 2 is a front view of the clamp which engages with the pump rod, and Fig. 3 is a sectional side elevation thereof, taken on the line a-a of Fig. 2.

Referring now more particularly to the drawings the numeral 1 indicates the upper end of the casing of the well, and 2 indicates the pump rod.

The numeral 3 refers to the back brace of the jack frame and 4: designates the front brace thereof, the said braces being secured together at their upper ends so as to form an arch and the lower end of the front brace being secured on the upper end of the casing 1. An oscillating member is pivoted to the upper end of the arch formed from the braces 3 and 4. This oscillating member is triangular in shape and comprises the rods 5, 6 and 7 which are united by the castings 8, 9 and 10. To the lower end of this oscillating member is attached the stirrup 11 which is operatively connected with any suitable motive power, (not shown) through which an oscillatory movement is imparted to said oscillating member, which in turn imparts an up and down motion to the casting 10 which carries the device for thepump rod 2.

The casting 10 carries a semi-cylindrical clamp" 12 which partially embraces the pump rod, said rod being held in position by grip "13. Extending laterally from each side of the casting 10 are socket members 14 which are provided with threaded sockets into which are threaded bearing rods 15. Pivotally attached to the grip 18 on each side at the lower ends are arms 16 whose upper ends have bearings through which the bearing rods 15 extend. The upper ends of these arms are held in position by nuts 17 which have enlarged heads and are screwed into internally threaded sockets in the outer ends of the bearing rods 15. I

It is obvious that as the pump is operated the bearing rods 15 will be subjected to the greatest wear and will eventually become practically worn out. When these rods have become worn until they are no further useful, they may be unscrewed from the socket member 1a and new bearing rods may be substituted therefor and the jack will then be comparatively new. Were these bearing rods not made detachable, when they became worn too much to be of further use, either a new jack would have to be installed or the casting 10 removed and a complete new casting substituted therefor.

What I claim is 1. In a device of the character described the combination with a jack frame and means through which power is derived, of a casting comprising a plurality of socket members, said socket members being provided with threaded sockets, threaded bearing rods screwed into said sockets, side arms through one end of which said bearing rods pass, nuts screwed into the internally threaded bearing rods, said nuts having enlarged heads, adapted to hold said arms in position on said bearing rods, and a semi-cylindrical member carried by said casting, adapted to partially embrace a pump rod.

2. In a pump jack, a casting, comprising a semi-cylindrical member, carried by said casting, adapted to partially embrace a pump rod and a plurality of socket members, said socket members being provided with threaded sockets, in combination with outwardly threaded bearing rods, screwed into said sockets, said bearing rods having ingripping Wardly threaded sockets in their outer ends, side arms through one end of which said bearing rods pass, outwardly threaded nuts, screwed into the internally threaded bearing rods, said nuts having flange like heads, adapted to hold said arms in position, on said bearing rods.

3. In a pump jack, a casting comprising a semi-cylindrical member carried by said casting, adapted to partially embrace a pump rod and a plurality of socket members, each being provided with threaded sockets, in combination with outwardly threaded bearing rods, screwed into said sockets, said bearing rods having inwardly threaded sockets in their outer ends, side arms through one end of which said bearing rods pass, and outwardly threaded nuts, screwed into the internally threaded bearing rods.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAKOB MARTIN STIEGER.

Witnesses J. R. KELLY, J. M. MooRE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. a 

